Course Description
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Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. ____________________________________ _______ Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
description
Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request. - PowerPoint PPT Presentation
Transcript of Course Description
Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
This course is registered with AIA
CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner ofhandling, using, distributing, or dealing in any material or product.___________________________________________Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
The State of Iowa has adopted the 2012 International Energy Conservation Code, we will look at the 2012 IECC and how the code impacts the commercial building envelope.
CourseDescription
LearningObjectives
1. The participant will be able to identify the climate zone for the
project location and choose the path of compliance that is appropriate with their design.
2. The 2012 International Energy Conservation Code will be compared to
the 2009 and how they impact the building envelope.
3. Misconceptions, pitfalls and missed information critical to a complete
COMcheck will be discussed. We will expolore presenters experience
with COMcheck reviews over the past four years as well as details that
need to be updated.
At the end of the this course, participants will be able to:
IECC 2012 Commercial Energy code updateCommercial Envelope
Statewide Code Compliance June 1st 2014
Introduction
David Ruffcorn, AIADesign/Energy EngineerIowa State Fire Marshal’s OfficeBuilding Code Bureau
• Commercial Energy Code Summary
• Energy Codes 101• Paths of compliance• Increased prescriptive insulation requirements – Table C402.2
• Manual daylighting controls for buildings seeking 30% < WWR ≤ 40%;
• Skylights/daylighting for large (>10,000 ft2) spaces w/ tall (15’) ceilings;
• Continuous air barrier requirement for most buildings – Mandatory
• Hints for compliance
• Details – We can do better!
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Resources
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Published by: International Codes Council
100,000 CF Statement
Review required by an Architect or Engineer
Review Required. The plans and specifications for all buildings to be constructed which exceed a total volume of 100,000
cubic feet of enclosed space that is heated or cooled shall be reviewed by a registered architect or licensed professional engineer for compliance with applicable energy efficiency
standards.
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• Statewide Code Compliance June 1st 2014
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IECC Compliance - Two Climate Zones Iowa Has Two Climate Zones
Zone 5 Zone 6
U-Factor and “UA” Alternatives
Simulated Performance
(software)
Prescriptive
R-values
Table R402.1.1
Table C402.2Simulated Performance Alternative
R405 - REMrate
C407 – DOE II
U-factor
R402.1.3 - REScheck
C402.3 - COMcheck
IECC Compliance - Three Options
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There are three paths of Compliance Prescriptive Trade-off Performance
Structure of the 2012 IECC
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Ch. 1 C101 - Scope and Application / Administrative and
Enforcement
Ch. 2 C201 - Definitions
Ch. 3 C301 - General Requirements
Ch. 4 C401 - Commercial Energy Efficiency
Ch. 5 C501 - Referenced Standards
Index
ResidentialSection
Ch. 1 R101 - Scope and Application /Administrative and Enforcement
Ch. 2 R201 - DefinitionsCh. 3 R301 - General RequirementsCh. 4 R401 - Residential Energy EfficiencyCh. 5 R501 - Referenced StandardsIndex
CommercialSection
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Building Types
C 101.4 - Applicability – What is NOT covered under this code:
C101.4.1 - Historic Buildings – State, National or Local historic property
C101.4.3 – Exceptions for Additions, Alterations, Renovations or Repairs
Exceptions – 1 to 8 C101.4.6 – Mixed occupancy – Where the building is covered
by the IECC Residential Provisions C101.5.2 – Low Energy Buildings – with energy use below 3.4
Btu/h Sf of floor area for space conditioning purposes.
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Building Types
C101.4.3 – Exceptions for Additions, Alterations, Renovations or Repairs
Structure of the 2012 IECC
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Commercial Energy EfficiencyChapter 4 (CE)
Building Envelope
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Building Envelope consists of: Fenestration Ceilings Walls
Above grade Below grade Mass walls
Floors Slab Crawl space
Conditioned space
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2012 Commercial IECCMandatory Requirements
Mandatory Sections Regardless of Compliance Path
C402.4 Air Leakage – With sections C402.4.1 through C402.4.8 Typo on C402.4.1.1 paragraph 3 recessed lighting fixtures
shall comply with section C402.4.8 C403.2 Provisions applicable to all mechanical systems – With
sections C403.2.1 through C403.2.11 C404 Service Water Heating – With sections C404.1 through
404.7.3
Cont…..
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2012 Commercial IECCMandatory Requirements
Mandatory Sections Regardless of Compliance Path C405 Electrical Power and Lighting Systems – With Mandatory
Sections C405.2 Lighting controls – With sections C405.2.1,
C405.2.2, C405.2.3 and C405.2.4 C405.3 Tandom Wiring C405.4 Exit Signs C405.6 Exterior Lighting C405.7 Electrical Energy Consumption – Multi-Family
C 408 Commissioning Mandatory from section C403.2.9
2012 Commercial Insulation and Fenestration by Climate Zone - Prescriptive
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Table C402.2
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2012 Commercial Insulation and Fenestration by Climate Zone - Prescriptive
Table C402.3
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2012 Commercial Compliance Approach Trade-off Method
Works for 95% of all projects
Trades off over insulated areas for under-insulated areas
Free and simple program
Tied to table C402.2
Use when the envelope assemblies don’t fit in the prescriptive table
2012 Commercial Compliance Approach Trade-off Method
Don’t try to calculate the assembly U-value
COMcheck does this MUCH better!
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2012 Commercial Compliance Approach Performance Method
State Requirements for Performance Energy Modeling Department of Energy DOEII – Energy Modeling Engine
Software Free and simple programs, Energy Plus, eQUEST, EPquick OpenStudio Etc.
The International Energy Conservation Code 2012 Section C407 outlines the Total Building Performance Method and ASHRAE 90.1 2010, Section 11.1 outlines the Energy Cost Budget Method. ASHRAE 90.1 2010 Appendix G can be used in specific circumstances but each project will need to be approved before using this method. The preferred method in
Iowa is the ASHRAE 90.1 2007 Energy Cost Budget Method, the other methods can be used, only with prior approval.
Vertical Fenestration Requirement C402.3.1 – Prescriptive (Max area)
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Percentage of Vertical Fenestration Area to Gross Wall Area
Allowed up to 30% maximum of above grade wall In Climate Zones 1-6, up to 40%
maximum of above grade wall with daylighting controls
Increased Vertical Fenestration with Daylighting Controls – Prescriptive C402.3.1.1
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Up to 40% vertical fenestration area allowed in Climate zones 1-6, provided
No less than 50% of the conditioned floor area is within a daylight zone
Automatic daylighting controls are installed in daylight zones; and
Visual Transmittance of vertical fenestration is ≥ 1.1 times SHGC
Exception:Fenestration that is outside the scope of NFRC 200 isn’t required to comply with VT
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Skylight Minimum Fenestration Area C402.3.1.2 Prescriptive
Limited to ≤ 3% of Roof Area Up to 5% allowed if automatic
daylighting controls installed in daylight zones under skylights
Minimum Skylight Fenestration AreaC402.3.2 – Prescriptive
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In certain types of enclosed spaces > 10,000 ft2 directly under a roof with ceiling heights > 15 ft total daylight zone under skylights to not be < ½ the floor
area and to provide a minimum skylight area to daylight zone of either Minimum of 3% of roof area with a skylight VLT at least 0.40 OR Provide a minimum skylight effective aperture of at least 1%
Exceptions Climate zones 6-8 Spaces with LPDs < 0.5 W/ft2
Documented shaded spaces Daylight area under rooftop monitors is > 50% of floor
area
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Lighting Controls in Daylight Zones – Under SkylightsC402.3.2.1 – Prescriptive
All lighting in the daylight zone shall be controlled by multilevel lighting controls that comply with C405.2.2.3.3Exceptions:
Climate zones 6-8 Spaces with LPDs < 0.5 W/ft2
Documented shaded spaces Daylight area under rooftop monitors is
> 50% of floor area
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Increased Skylight SHGC C402.3.3.3
In Climate Zones 1-6, skylights above daylight zones with automated daylight controls are permitted a maximum SHGC of 0.60
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Increased Skylight U-Factor C402.3.3.4 – Prescriptive
Skylights above daylight zones with automated daylight controls are permitted a maximum U-factor of
– 0.9 in Climate Zones 1-3 – 0.75 in Climate Zones 4-8
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Air Barriers and ConstructionC402.4.1 and C402.4.1.1 –
(Mandatory)
New and Improved!!! And required regardless of compliance path!
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Continuous air barrier required in: Iowa’s climate zones 5 & 6
Air barrier requirements: Placement allowed
Inside of building envelope Outside of building envelope Located within assemblies composing envelope OR Any combination thereof
Continuous for all assemblies part of the thermal envelope and across joints and assemblies
Joints and seams to be sealed per C402.4.2 Recessed lighting to comply with C404.2.8. Where similar objects are installed that penetrate the air barrier, make
provisions to maintain the air barrier’s integrity
Air Barriers and ConstructionC402.4.1 and C402.4.1.1 - Mandatory
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Three ways to comply with air barrier requirements
Materials Assemblies Building
Air Barrier Compliance OptionsC402.4.1.2 - Mandatory
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Materials with air permeance ≤ 0.004 cfm/ft2 under pressure differential of 0.3 in. w.g. tested in accordance with ASTM E 2178
These materials meet this requirement:
Air Barrier Materials (Compliance)C402.4.1.2.1 - Mandatory
Material Thickness (minimum)
Plywood 3/8 in.
Oriented strand board 3/8 in.
Extruded polystyrene insulation board ½ in.
Foil-faced urethane insulation board ½ in.
Closed cell spray foam minimum density of 1.5 pcf 1-1/2 in.
Open cell spray foam density between 0.4 and 1.5 pcf 4.5 in.
Exterior gypsum sheathing or interior gypsum board ½ in.
Cement board ½ in.
Built up roofing membrane
Modified bituminous roof membrane
Fully adhered single-ply roof membrane
A Portland cement/sand parge, stucco, or gypsum plaster 5/8 in.
Cast-in-place and precast concrete
Sheet metal or aluminum
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OR
Assemblies of materials and components (sealants, tapes, etc.) with average air leakage ≤ 0.04 cfm/ft2 under pressure differential of 0.3 in. w.g. tested in accordance with ASTM E 2357, 1677 or 283
These assemblies meet this requirement: Concrete masonry walls coated with one application either of block filler and two applications of a paint or sealer coating OR Portland cement/sand parge, stucco or plaster minimum ½ thick
Air Barrier Assemblies (Compliance)C402.4.1.2.2
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OR
Air leakage rate of completed building tested and confirmed to not exceed 0.40 cfm/ft2 at a pressure differential of 0.3 inches water gauge per ASTM E779 or equivalent method approved by code official
Air Barrier Building Test (Compliance)C402.4.1.2.3
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Air LeakageC402.4.2 to C402.4.8 ( Mandatory)
C402.4.2 Air Barrier Penetrations Penetrations of the air barrier and paths of air leakage shall be caulked,
gasketed or otherwise sealed.C402.4.3 Air Leakage of Fenestration Shall meet Table C402.4.3 and tested to referenced standard.C402.4.4 Doors and Access Openings to Shafts, Stairways etc. Shall meet either C402.4.3 or shall be gasketed, weather stripped or sealedC402.4.5 Air Intakes, Exhausts, Stairways and Shafts Shall be provided with dampers in accordance with C402.4.5.1 &2C402.4.6 Loading Dock WeathersealsC402.4.7 Vestibules Required from a space 3,000 Sf in area or more.C402.4.8 Recessed Lighting All recessed luminaires shall be IC-rated and labeled as having a leakage
rate of not more than 2.0 cfm@75 Pa
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One Additional Efficiency Feature Must Be Selected to Comply with the IECC More efficient lighting
system (consistent with 90.1-2010), or
More efficient HVAC system Installation of onsite
renewables 3% of the regulated energy
High Efficiency HVAC
Additional Efficiency Requirements - Prescriptive
More Efficient Lighting System
Onsite Renewables
Energy Code Plan ReviewWhat you need to know to pass the first time
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Plan Review Submittal -Hints
What’s needed to pass Energy Code Plan Review….. Complete drawings, specifications and Energy Code
documentation. The drawings, specifications and Energy Code must contain the
same information. Architectural and MEP must use same code. Storefront windows and doors have different U-values so they must
be specified in two locations. Update your standard specification – Construction materials change
over the years so should your specification. COMcheck is only interested in the location and listed value of your
insulation. Mechanical and Electric are really spread sheets. The values listed in your COMcheck should be in the specification or
drawings exactly as noted. Update your standard details – We can do better!
Specifications to Review
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Specification Sections Always Under Review Section 07 2100 Thermal Insulation Section 07 5300 Elastomeric Membrane Roofing Section 07 7200 Roofing Accessories Section 08 4113 Aluminum-Framed Entrances and Storefronts Section 08 4413 Glazed Aluminum Curtain Walls Section 08 4523 Translucent Fiberglass Sandwich Panel Section 23 0719 HVAC Pipe Insulation Section 22 0719 Pipe Insulation
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Specifications to Review
Section 07 2100 Thermal InsulationPART 2 PRODUCTS2.01 APPLICATIONS
A. Rigid Insulation Under Concrete Slabs: Extruded or expanded polystyrene board.B. Rigid Insulation at Perimeter of Foundation: Extruded or expanded polystyrene board.C. Rigid Insulation Inside Masonry Cavity Walls: Extruded or expanded polystyrene board.
2.02 FOAM BOARD INSULATION MATERIALSA. Extruded Polystyrene Board Insulation: ASTM C 578, Type IV; Extruded
polystyrene board with either natural skin or cut cell surfaces; with the following characteristics:
1. Flame Spread Index: 25 or less, when tested in accordance with ASTM E84.
2. Smoke Developed Index: 450 or less, when tested in accordance with ASTM E84.
3. Board Size: 48 x 96 inch.4. Board Thickness: As indicated
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Specifications to Review
Section 07 5300 Elastomeric Membrane Roofing
PART 2 PRODUCTS2.04 INSULATION
A. Polyisocyanurate Board Insulation: Rigid cellular foam, complying with ASTM C1289, Type II, Class 2, polymer bonded glass fiber mat both faces and with the following characteristics:
1. Board Thickness: 1.5 inch.2. Board Edges: Square.3. Tapered Units: Provide factory-tapered insulation boards
fabricated to slope of 1/4 inch per 12 inches unless otherwise indicated.4. Provide composite boards with oriented strand board laminated
to one side in lieu of cover board when required by manufacturer to meet system warranty requirements.
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Specifications to Review
Section 07 7200 Roof Accessories
PART 2 PRODUCTS2.04 INSULATION
2.02 ROOF HATCHESA. Manufacturers - Roof Hatches:1. Basis-of-Design: Bilco Co., Enhanced Performance E-50T.a. Subject to compliance with the specified requirements, provide the
basis-of-design product or a comparable product approved by the Architect, prior to bid.B. Roof Hatches: Factory-assembled steel frame and cover, complete with operating and release
hardware.1. Style: Provide flat metal covers unless otherwise indicated.2. Mounting: Provide frames and curbs suitable for mounting on corrugated metal roof deck.3. Size: 36" x 36"4. Loads: Fabricate roof hatches to withstand 40-lbf/sq. ft. external and 20-lbf/sq. ft. internal loads.C. Frames/Curbs: One-piece curb and frame with integral cap flashing to receive roof flashings;
extended bottom flange to suit mounting.1. Material: Aluminum,.090 inch thick.2. Insulation: 2 inch thick polyisocyanurate board with R-value of 12.3. Interior Lid Liner: Manufacturer's standard metal liner of same material and finish as metal curt.4. Exterior Curb Liner: Manufacturer's standard metal liner of same material and finish as metal curb.5. Curb Height: 12 inches from surface of roof deck, minimum.
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Specifications to ReviewSection 08 1113 Aluminum-Framed Entrances and Storefronts
1.02 Performance Requirements
A. General Performance: Aluminum-framed systems shall withstand the effects of the followingperformance requirements without exceeding performance criteria or failure due to defectivemanufacture, fabrication, installation, or other defects in construction:
1. Movements of supporting structure indicated on Drawings including, but not limited to,story drift and deflection from uniformly distributed and concentrated live loads.2. Dimensional tolerances of building frame and other adjacent construction.3. Failure includes the following:
a. Deflection exceeding specified limits.b. Thermal stresses transferring to building structure.c. Framing members transferring stresses, including those caused by thermal andstructural movements to glazing.d. Noise or vibration created by wind and by thermal and structural movements.e. Loosening or weakening of fasteners, attachments, and other components.f. Failure of operating units.
B. Wind Loads: As indicated on Drawings.C. Deflection of Framing Members:
1. Deflection Parallel to Glazing Plane: Limited to L/360 of clear span or 1/8 inch,whichever is smaller.
D. Air Infiltration: Provide aluminum-framed systems with maximum air leakage through fixedglazing and framing areas of 0.06 cfm/sq. ft. of fixed wall area when tested according toASTM E 283 at a minimum static-air-pressure difference of 6.24 lbf/sq. ft.E. Thermal Transmittance Test (Conductive U-Value)
1. Test in accordance with NFRC-102.2. Conductive thermal transmittance fixed unit assembly (U-Value) shall not be more than 0.37
BTU/hr•ft²•ºF when glazed with 1 inch insulated - 1/4 inch clear low emissivity, 1/2 inch air, 1/4 inchclear glass.
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Specifications to Review
Section 07 4523 Translucent Fiberglass Sandwich Panel
PART 2 PRODUCTS2.04 Panel Construction
A. Provide sandwich panels of flat fiberglass reinforced translucent face sheets laminated to a grid core of mechanically interlocking I-beams. The adhesive
bonding line shall be straight, cover the entire width of the I-beam and have a neat, sharp edge.
1. Thickness: 2-3/4”2. Light transmission: 12-15%3. Solar heat gain coefficient 0.18.4. Panel U-factor by NFRC certified laboratory: 2-3/4” thermally
broken grid 0.14.5. Complete insulated panel system shall have NFRC certified U-
factor of 0.20.
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Specifications to Review
Section 23 0719 HVAC Pipe InsulationSection 22 0719 Pipe Insulation
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Energy Code Plan ReviewStandard Details – We can do better!
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Department of Energy Slab on Grade Details
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Bad Practice – Non Thermally Broken Slabs
Bad Practice – What the?
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Bad Practice – Parapet Thermal Bridge
Bad Practice – Thermal Energy can rise?
59Attic Outside Walls
Bad Practice – Attic Knee Walls - Undetailed
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Building Science Corp’s Perfect Commercial Wall
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Bad Practice – Missing Insulation
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Questions
This concludes The American Institute of Architects Continuing Education Systems Course
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